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Home >> Lexus >> 2018 >> GX 460 Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display System (Diagnostics - Introduction) (1 Of 2) >> Meter / Gauge System >> System Description [08/2021 - ] >> System Description [08/2021 - ]

System Description [08/2021 - ]

  1. INPUT AND OUTPUT SIGNALS OF COMBINATION METER ASSEMBLY 
    1. Meter or Gauge
      Item Condition Input/Output Communication Line Signal Sender
      Speedometer Displayed Input CAN Vehicle speed signal Master cylinder solenoid (skid control ECU)
      - Output CAN Vehicle speed signal Combination meter assembly
      Speed tolerance A signal
      Speed tolerance B signal
      Tachometer Displayed Input CAN Engine RPM data signal ECM
      Fuel receiver gauge Displayed Input CAN Shift position signal ECM
      Starter signal
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Direct line Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Fuel level signal Fuel sender gauge assembly
      - Output CAN Main tank fuel level signal Related ECUs
      Fuel sender signal
      Engine coolant temperature receiver gauge Displayed Input CAN Engine coolant temperature signal ECM
    2. Warning or Indicator Light
      Item Condition Input/Output Communication Line Signal Component
      Taillight indicator light (for mph Type) Turns on Input CAN Taillight request signal Main body ECU (multiplex network body ECU)
      Headlight indicator light (for km/h Type) Turns on Input CAN Low beam headlight request signal Main body ECU (multiplex network body ECU)
      Open door warning light Turns on Input CAN Front courtesy light switch LH signal Main body ECU (multiplex network body ECU)
      Front courtesy light switch RH signal
      Rear courtesy light switch LH signal
      Rear courtesy light switch RH signal
      Back door courtesy light switch signal
      Engine hood courtesy switch signal
      Glass hatch courtesy switch signal
      Turn indicator light Blinks Input Direct line Turn signal switch signal Headlight dimmer switch assembly
      Hazard warning signal switch signal Hazard warning switch assembly
      CAN Flasher request signal Main body ECU (multiplex network body ECU)
      Output CAN Turn signal light operation signal Related ECUs
      Hazard warning signal switch signal
      Direct line Turn signal light operation signal Each turn signal light
      Hazard warning signal switch signal
      Seat belt warning light Blinks Input Direct line Driver side seat belt buckle switch signal Front seat inner belt assembly LH
      Front passenger side seat belt buckle switch signal Airbag sensor assembly
      Front passenger seat occupant detection sensor signal
      CAN Shift P position signal ECM
      Parking brake switch signal Main body ECU (multiplex network body ECU)
      Automatic high beam indicator light Turns on Input CAN Automatic high beam indicator signal Main body ECU (multiplex network body ECU)
      Tire pressure warning light Turns on / Blinks Input CAN TPMS warning indicate condition 1 signal Main body ECU (multiplex network body ECU)
      High beam indicator light Turns on Input CAN High beam headlight request signal Main body ECU (multiplex network body ECU)
      Front fog indicator light Turns on Input CAN Front fog light request signal Main body ECU (multiplex network body ECU)
      Parking brake warning light Turns on Input CAN Parking brake switch signal Main body ECU (multiplex network body ECU)
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Downhill assist control indicator light Turns on / Blinks Input CAN Downhill assist control indicator light request signal Master cylinder solenoid (skid control ECU)
      ABS warning light Turns on / Blinks Input CAN ABS warning light signal Master cylinder solenoid (skid control ECU)
      TRAC OFF indicator light Turns on Input CAN TRAC OFF indicator light signal Master cylinder solenoid (skid control ECU)
      CRAWL indicator light Turns on / Blinks Input CAN CRAWL indicator light signal Master cylinder solenoid (skid control ECU)
      Brake warning light Turns on Input CAN Brake warning light control flag signal Master cylinder solenoid (skid control ECU)
      Brake reservoir level warning switch signal
      Slip indicator light Turns on / Blinks Input CAN Slip indicator light signal Master cylinder solenoid (skid control ECU)
      VSC OFF indicator light Turns on Input CAN VSC OFF indicator light signal Master cylinder solenoid (skid control ECU)
      Multi-terrain select indicator light Turns on Input CAN Multi terrain select indicator control flag signal Master cylinder solenoid (skid control ECU)
      LDA indicator light Turns on / Blinks Input CAN Front camera vision blocked signal Forward recognition camera
      Steering assist unusable text display signal
      BSM indicator light Turns on Input CAN BSD module status signal Blind spot monitor sensor RH
      BSD main switch signal
      Center differential lock indicator light Turns on / Blinks Input CAN Center differential lock indicator request signal 4 wheel drive control ECU
      4LO indicator light Turns on / Blinks Input CAN 4WD indicator ON and flashing request signal 4 wheel drive control ECU
      Clearance sonar main indicator light Turns on Input CAN Clearance sonar main indicator request signal Clearance warning ECU assembly
      Smart access system with push-button start indicator light Turns on / Blinks Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      PCS OFF indicator light Turns on / Blinks Input CAN PCS fault condition text display signal Driving support ECU assembly
      Eco drive indicator light Turns on Input CAN Ecology light indicator signal ECM
      2nd start indicator light Turns on Input CAN ECT SNOW indicator light signal ECM
      Cruise control indicator light Turns on Input CAN ACC ASL display ID2 signal ECM
      Dynamic radar cruise control indicator light Turns on Input CAN ACC ASL display ID2 signal ECM
      SET indicator light Turns on Input CAN ACC ASL display ID2 signal ECM
      MIL (Malfunction indicator light) Turns on / Blinks Input CAN MIL (malfunction indicator light) request signal ECM
      Engine maintenance requirement signal
      ENG display ID1 signal
      Low engine oil pressure warning light Turns on / Blinks Input Direct line Engine oil pressure switch signal Engine oil pressure switch assembly
      CAN Engine speed signal ECM
      Kinetic dynamic suspension system indicator light Turns on Input CAN Kinetic dynamic suspension system indicator light signal Stabilizer control ECU
      Charge warning light Turns on Input Direct line Charger warning light signal Generator assembly
      SRS warning light Turns on Input CAN SRS warning light control request signal Airbag sensor assembly
      Low fuel level warning light Turns on Input Direct line Fuel level signal Fuel sender gauge assembly
      Icy street warning light Turns on / Blinks Input CAN Ambient temperature data (display) signal Air conditioning amplifier assembly
    3. Multi-information Display
      Item Condition Input/Output Communication Line Signal Component
      Average fuel consumption (After start) Displayed Input CAN Engine RPM data signal ECM
      Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Vehicle speed signal
      Fuel consumption signal ECM
      Average speed (After start) Displayed Input CAN Engine RPM data signal ECM
      Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Vehicle speed signal
      Output CAN Drive monitor unit signal 1 Radio receiver assembly
      Drive monitor display (after starting average speed) signal
      Elapsed time (After start) Displayed Input CAN Engine RPM data signal ECM
      Output Drive monitor display (after starting average speed) signal Multi-media module receiver assembly
      Distance (After start) Displayed Input CAN Engine RPM data signal ECM
      Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Vehicle speed signal
      Distance (Range) Displayed Input CAN Engine type information 1 signal ECM
      Engine type information 2 signal
      Engine type information 3 signal
      Engine type information 4 signal
      Engine RPM data signal
      Fuel consumption
      Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Eco driving indicator zone display Displayed Input CAN Eco-zone indicator level signal ECM
      Total time Displayed Input CAN Engine RPM data signal ECM
      Oil maintenance mileage Displayed Input CAN Oil maintenance mileage signal ECM
      Oil mileage unit signal
      Oil maintenance screen inversion demand
      Oil change indicator 2 signal
      Output Unit change 2(KM/MILE) signal
      Maintenance Required Soon Displayed Input CAN Starter signal ECM
      Maintenance Required Visit Your Dealer Displayed Input CAN Starter signal ECM
      Current fuel consumption Displayed Input CAN Fuel consumption signal ECM
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Direct line Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Output CAN Drive monitor unit signal 0 Related ECUs
      Average fuel consumption (After refuel) Displayed Input CAN Fuel consumption signal ECM
      Total average fuel consumption reset request signal Radio and display receiver assembly
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Direct line Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Output CAN Drive monitor unit signal 3 Related ECUs
      Total average speed Displayed Input CAN Engine speed signal ECM
      Total average fuel consumption reset request signal Radio and display receiver assembly
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Direct line Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Output CAN Drive monitor unit signal 5 Related ECUs
      Average fuel consumption (After reset) Displayed Input CAN Fuel consumption signal ECM
      Total average fuel consumption reset request signal Radio and display receiver assembly
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Direct line Vehicle speed pulse input signal Master cylinder solenoid (skid control ECU)
      Output CAN Drive monitor unit signal 6 Related ECUs
      Outside temp Displayed Input CAN Ambient temperature display signal Air conditioning amplifier assembly
      CDY-2 Displayed Input CAN CDY mode signal ECM
      CDY-4 Displayed Input CAN CDY mode signal ECM
      ADJUSTING FORWARD CAMERA Displayed Input CAN Camera adjustment mode text display signal Forward recognition camera
      ADJUSTING FRONT RADAR BEAM Displayed Input CAN Inspection mode for ACC signal Driving support ECU assembly
      CHECKING CRUISE CONTROL BRAKE Displayed Input CAN Inspection mode for ACC signal Driving support ECU assembly
      Headlight System Uninitialized Visit Your Dealer Displayed Input CAN LED headlight indicator signal Headlight ECU sub-assembly LH
      BRAKE! Displayed Input CAN PCS warning message signal Driving support ECU assembly
      Push and Hold Engine Switch for Emergency Stop Displayed Input CAN Smart system warning 2 signal Certification ECU (smart key ECU assembly)
      Shift to N and Press Engine Switch to Restart Displayed Input CAN Smart system warning 2 signal Certification ECU (smart key ECU assembly)
      Radar cruise control information (image display) Displayed Input CAN ACC ASL display ID2 signal ECM
      Braking Power Low {Stop} in a Safe Place See Owner's service information Displayed Input CAN Brake warning light control flag signal Master cylinder solenoid (skid control ECU)
      Crawl Has Been Deactivated Displayed Input CAN Crawl control display request for multi-information display signal Master cylinder solenoid (skid control ECU)
      Shift to P position when parked Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      Each door open (image display) Displayed Input CAN Front courtesy light switch LH signal Main body ECU (multiplex network body ECU)
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Detection display (image display) Displayed Input CAN CSR display request signal Clearance warning ECU assembly
      Parking Assist Malfunction Visit Your Dealer Displayed Input CAN CSR display request signal Clearance warning ECU assembly
      Parking Assist Unavailable Clean Parking Assist Sensor Displayed Input CAN CSR display request signal Clearance warning ECU assembly
      Parking Assist Unavailable Displayed Input CAN CSR display request signal Clearance warning ECU assembly
      Auto power off to conserve battery Displayed Input CAN Smart system warning 2 signal Certification ECU (smart key ECU assembly)
      Release Parking Brake Displayed Input CAN Parking brake switch signal Main body ECU (multiplex network body ECU)
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Key not detected Check key location Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      Release Accelerator Displayed Input CAN Drive start control multi-information display request signal ECM
      Check Engine Reduced Engine Power Visit Your Dealer Displayed Input CAN Engine maintenance requirement signal ECM
      Check Engine Visit Your Dealer Displayed Input CAN Engine maintenance requirement signal ECM
      Reduced Engine Power Visit Your Dealer Displayed Input CAN Engine maintenance requirement signal ECM
      Engine maintenance required Visit your dealer Displayed Input CAN Engine maintenance requirement signal ECM
      SRS Airbag System Malfunction Visit Your Dealer Displayed Input CAN Airbag warning light control request signal Airbag sensor assembly
      Antilock Brake System Malfunction Visit Your Dealer Displayed Input CAN ABS warning light control flag signal Master cylinder solenoid (skid control ECU)
      Radar Cruise Control Unavailable Clean Sensor Displayed Input CAN ACC ASL display ID2 signal ECM
      Radar Cruise Control Unavailable Displayed Input CAN ACC ASL display ID2 signal ECM
      Radar Cruise Control Unavailable Depress Brake to Resume Driving Displayed Input CAN ACC ASL display ID2 signal ECM
      Check Access System with Elec. Key Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      BSM not available Displayed Input CAN BSD module status signal Blind spot monitor sensor RH
      Cruise Control Malfunction Visit Your Dealer Displayed Input CAN ACC ASL display ID2 signal ECM
      Lane Departure Alert Malfunction Visit Your Dealer Displayed Input CAN Fault condition text display signal Forward recognition camera
      Lane Departure Alert Unavailable Displayed Input CAN Steering assist unusable text display signal Forward recognition camera
      Pre-Collision System Malfunction Visit Your Dealer Displayed Input CAN PCS fault condition text display signal Driving support ECU assembly
      Check BSM system Displayed Input CAN BSD module status signal Blind spot monitor sensor RH
      Oil Pressure Low { Stop} in a Safe Place See Owner's service information Displayed Input Direct line Engine oil pressure switch signal Engine oil pressure switch assembly
      CAN Engine speed signal ECM
      High transmission fluid temperature Displayed Input CAN A/T oil temperature warning mode signal ECM
      Check Transmission System Displayed Input CAN A/T oil temperature warning mode signal ECM
      Lane Departure Alert Unavailable Below Approx 50km/h Displayed Input CAN Speed condition failure text display signal Forward recognition camera
      Lane Departure Alert Unavailable Below Approx 32MPH Displayed Input CAN Speed condition failure text display signal Forward recognition camera
      Lane Departure Unavailable at Current Speed Displayed Input CAN Speed condition failure text display signal Forward recognition camera
      Key detected in vehicle Displayed Input CAN Smart system warning 3 signal Certification ECU (smart key ECU assembly)
      Turn power off Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      Moon roof open Displayed Input CAN Slide roof open warning request signal Main body ECU (multiplex network body ECU)
      Window Open Displayed Input CAN Power window open warning request signal Main body ECU (multiplex network body ECU)
      Window / Moon Roof Open Displayed Input CAN Slide roof open warning request signal Main body ECU (multiplex network body ECU)
      Depress Brake Pedal and Touch Engine Switch with Key Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      Depress brake pedal and push engine switch to start Displayed Input CAN Smart system warning 3 signal Certification ECU (smart key ECU assembly)
      Push the engine switch while turning the steering wheel in either direction Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      Crawl Not Available Select L4 and Shift to [D] or [R] Position Displayed Input CAN Crawl control display request for multi-information display signal Master cylinder solenoid (skid control ECU)
      Crawl Not Available Check System Operation Conditions Displayed Input CAN Crawl control display request for multi-information display signal Master cylinder solenoid (skid control ECU)
      Drive-Start Control Malfunction Visit Your Dealer Displayed Input CAN Drive start control multi-information display request signal ECM
      Brake Override Malfunction Visit Your Dealer Displayed Input CAN Brake override system multi-information display request signal ECM
      Key Battery Low Replace Key Battery Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      Engine Oil Level Low Add or Replace Displayed Input CAN L4 indicator ON and flashing request signal 4 wheel drive control ECU
      Engine speed signal ECM
      Direct line Engine oil level signal Engine oil level sensor
      Headlight System Malfunction Visit Your Dealer Displayed Input CAN Automatic high beam indicator signal Main body ECU (multiplex network body ECU)
      Headlight leveling indicator signal Headlight ECU sub-assembly LH
      LED headlight indicator signal Headlight ECU sub-assembly LH
      RSA Malfunction Visit Your Dealer Displayed Input CAN TSR warning message signal Forward recognition camera
      Accelerator and Brake Pedals Pressed Simultaneously Displayed Input CAN Brake override system multi-information display request signal ECM
      Windshield Washer Fluid Low Displayed Input Direct line Washer fluid level signal Level warning switch assembly
      Fuel Low Displayed Input Direct line Fuel level signal Fuel sender gauge assembly
      Oil Maintenance Required Soon Displayed Input CAN Oil change indicator 2 signal ECM
      Oil Maintenance Required Displayed Input CAN Oil change indicator 2 signal ECM
      Depress brake pedal and push engine switch to start Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      VSC Turned Off Pre-Collision Brake System Unavailable Displayed Input CAN VSC OFF light signal Master cylinder solenoid (skid control ECU)
      PB temporary unusable condition text display signal Driving support ECU assembly
      Pre-Collision System Unavailable Displayed Input CAN PCS temporary unusable condition text display signal Driving support ECU assembly
      Pre-Collision System Off Displayed Input CAN PCS warning message signal Driving support ECU assembly
      Shift to P position when parked Key not detected Check key location Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      Key not detected Check key location Turn power off Displayed Input CAN Smart system warning 1 signal Certification ECU (smart key ECU assembly)
      WOULD YOU LIKE TO TAKE A BREAK? Displayed Input CAN SWS request advisory display signal Forward recognition camera
      PLEASE TAKE A BREAK Displayed Input CAN SWS request advisory display signal Forward recognition camera
      Front Camera Unavailable Displayed Input CAN PCS TEMP message (camera) signal Driving support ECU assembly
      Front Camera Unavailable See Owner's service information Displayed Input CAN PCS DUST message (camera) signal Driving support ECU assembly
      Pre-Collision System Unavailable Displayed Input CAN PCS TEMP message (camera) signal Driving support ECU assembly
      Pre-Collision System Unavailable Clean Sensor Displayed Input CAN PCS DUST message (radar) signal Driving support ECU assembly
      CHECKING PCS BRAKE Displayed Input CAN Inspection mode signal Driving support ECU assembly
      Crawl Control Speed Displayed Input CAN Crawl control display request for multi-information display signal Master cylinder solenoid (skid control ECU)
      Check air suspension system Displayed Input CAN OFF light signal Suspension control ECU
      Attention: Check Rear Seat Displayed Input CAN Rear Seat Reminder MID Request signal Main body ECU (multiplex network body ECU)
    4. Buzzer
      Item Condition Input/Output Communication Line Signal Component
      Smart access system with push-button start warning buzzer Sounds once Input CAN Meter buzzer intermittence request signal Certification ECU (smart key ECU assembly)
      Sounds intermittently
      Sounds intermittently (maximum: 9 times)
      Immobiliser certification buzzer Sounds once Input CAN Immobiliser key identification completion signal Certification ECU (smart key ECU assembly)
      Restart while driving notification buzzer Sounds continuously Input CAN Smart entry and start system warning request signal Certification ECU (smart key ECU assembly)
      Engine switch operation while driving warning buzzer Sounds intermittently Input CAN Engine switch operation buzzer intermittence request signal Certification ECU (smart key ECU assembly)
      Door open while not in P warning buzzer Sounds continuously Input CAN Meter buzzer intermittence request signal Certification ECU (smart key ECU assembly)
      Dynamic radar cruise low speed cancel buzzer Sounds twice Input CAN Low speed cancel buzzer request signal ECM
      Dynamic radar cruise low speed range preceding vehicle lost buzzer 4 Sounds continuously Input CAN Low speed zone leading vehicle lost buzzer signal ECM
      Engine oil pressure warning buzzer Sounds intermittently Input Direct line Engine oil pressure switch signal Engine oil pressure switch assembly
      CAN Engine speed signal ECM
      MIL (Malfunction indicator light) buzzer Sounds once Input CAN MIL (malfunction indicator light) request signal ECM
      Engine maintenance requirement signal
      ENG display ID1 signal
      Sports shift reject buzzer Sounds twice Input CAN Reject buzzer signal ECM
      LDA warning buzzer Sounds intermittently Input CAN LDA buzzer signal Forward recognition camera
      Hands free caution buzzer Sounds twice Input CAN Hands free caution text display signal Forward recognition camera
      RSA warning buzzer 4 Sounds continuously Input CAN Buzzer request of permanent area signal Forward recognition camera
      PKB-ON driving warning buzzer Sounds intermittently Input CAN Parking brake switch signal Main body ECU (multiplex network body ECU)
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Driving with door ajar warning buzzer Sounds intermittently Input CAN Front courtesy light switch LH signal Main body ECU (multiplex network body ECU)
      Front courtesy light switch RH signal
      Rear courtesy light switch LH signal
      Rear courtesy light switch RH signal
      Back door courtesy light switch signal
      Engine hood courtesy switch signal
      Glass hatch courtesy switch signal
      Vehicle speed signal Master cylinder solenoid (skid control ECU)
      Brake fluid low warning buzzer Sounds intermittently Input CAN Brake fluid level warning switch signal Master cylinder solenoid (skid control ECU)
      Light reminder warning buzzer Sounds continuously Input CAN Front courtesy light switch LH signal Main body ECU (multiplex network body ECU)
      Lighting system state signal
      4WD warning buzzer Sounds intermittently Input CAN Buzzer control flag signal 4 wheel drive control ECU
      3 Sounds continuously
      Seat belt warning buzzer Sounds intermittently Input CAN Driver side seat belt buckle switch signal Front seat inner belt assembly LH
      Front passenger side seat belt buckle switch signal Airbag sensor assembly
      Front passenger seat occupant detection sensor signal
      CAN Shift P position signal ECM
      Shift R position signal
      Parking brake switch signal Main body ECU (multiplex network body ECU)
      Vehicle stability control sideways sliding warning buzzer Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Temperature warning / CRAWL cancel warning buzzer Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Brake system temperature rise/Active Test Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Brake system low braking force warning buzzer Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Hill-start assist control (Step 1) under normal control buzzer Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Hill-start assist control (Step 1) complete notification buzzer Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Hill-start assist control (Step 2) set buzzer Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Hill-start assist control (Step 2) reset buzzer Sounds intermittently Input CAN Buzzer control flag signal Master cylinder solenoid (skid control ECU)
      Turn signal flasher buzzer Sounds intermittently Input Direct line Turn signal switch signal Headlight dimmer switch assembly
      Hazard warning signal switch signal Hazard warning switch assembly
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